Top definition
Stands for "oh I understand".
Like oic (oh I see), but more accurate since most of the time you don't actually see what the other person is doing.
Person 1: -insert story here-
Person 2: Oic.
Person 1: D: Stalker!
Person 2: Oops, oiu*
by SkaterSeacow March 11, 2010
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